<template>
    <div class="login_container">
        <div class="login_box">
            <!-- 头像区域 -->
            <div class="avatar_box">
                <img src="../assets/logo.png">
            </div>
            <!-- 登录表单区域 -->
            <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
                <!-- 用户名区域 -->
                <el-form-item prop="username">
                    <el-input v-model="loginForm.username" prefix-icon="iconfont icon-users"></el-input>
                </el-form-item>
                <!-- 密码区域 -->
                <el-form-item prop="password">
                    <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password"></el-input>
                </el-form-item>
                <!-- 按钮区域 -->
                <el-form-item class="btns">
                    <el-button type="primary" @click="login">登录</el-button>
                    <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>
        </div>
    </div>
</template>

<script>
export default {
    data(){
        return {
           loginForm: {
           username: 'admin',
           password: '123456'
        },
         loginFormRules: {
             username: [
                { required: true, message: '请输入活动名称', trigger: 'blur' },
                { min: 3, max: 10, message: '长度在 3 到 10个字符', trigger: 'blur' }
             ],
             password: [
                 { required: true, message: '请输入账户密码', trigger: 'blur' },
                 { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
             ]
         }
    }
}  ,
    methods: {
        resetLoginForm() {
            this.$refs.loginFormRef.resetFields();
        },
        login() {
            this.$refs.loginFormRef.validate(async valid => {
                if(!valid) return;
                const {data: res} = await this.$http.post("login",this.loginForm)
                // console.log(res);
                // 判断从浏览器输入的数据，在服务端是否存在，若存在则登录成功
                if(res.meta.status !== 200) return this.$message.error('登录失败');
                this.$message.success('登录成功')
                //将登录成功之后的token保存到客户端的sessionStorage中
                // console.log(res)
                window.sessionStorage.setItem('token',res.data.token)
                //1.1项目中除了登录之外其他api接口，必须在登录之后才能访问
                //1.2token只应在当前网站打开之间生效，所以将token保存在sessionStorage中
                //2.通过编程式导航跳转到后台主页，路由地址是/home
                this.$router.push("/home");
            })
        }
    }
}
</script>

<style lang="less" scoped>
.login_container{
   background-color: #2b4b6b;
   height: 100%;
}

.login_box {
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
}
.avatar_box{
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%,-50%);
    background-color: #fff;
    img{
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eee;
    }
}
.login_form {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
}
.btns {
    display: flex;
    justify-content: flex-end;
}
</style> 